The Bunsen Burner is so named because it is thought ___________ by Robert Bunsen.A.to be inventedB.h

题目简介

The Bunsen Burner is so named because it is thought ___________ by Robert Bunsen.A.to be inventedB.h

题目详情

The Bunsen Burner is so named because it is thought ___________ by Robert Bunsen.
A.to be inventedB.having been invented
C.inventedD.to have been invented
题型:单选题难度:偏易来源:不详

答案

D
本句考查动词的被动语态和时态,it+is+动词ed形式,to do是固定的搭配用法。而Bunsen Burner的发明是过去发生的动作,所以用完成时态。

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